My experience of multiple orgasms, as a man, is that I have only come across one woman who was truly capable of having one orgasm immediately after another. We were FWB for a while and she was unusual in that she came easily from PIV sex without needing clitoral stimulation.
Our multiple orgasm sessions involved my using a dildo on her. Once she had reached an initial orgasm, we would cease for perhaps 30 seconds and then recommence vigorous use of the dildo. Within less than a minute she would come again, there would be another short rest, and so on ad infinitum. We would lose count of how many times she came, but it was often more than thirty.
The crucial factor, in my opinion, was that as direct stimulation of her clitoris was not involved there was no extreme sensitivity that occurs immediately after orgasm. Having said that, I am a man and what do I know of the mechanics of female sexuality?
My current partner can have more than one orgasm when using a vibrator, but after her orgasm there is not the situation of her remaining on a sort of plateau where minimal stimulation takes her to another orgasm. When she has an orgasm there is almost a return to square one with a lot of clitoral stimulation being required to bring her off again. Luckily, she does not seem to experience the extreme clitoral sensitivity.
I think the moral of the tale is that, as usual, we are all different. Even women who can have more than one orgasm are all individual in the way they manage to do so.